The characterization of metal complexes in typical Kuwait atmospheric residues using both GPC coupled with ICP–MS and HT GC–AED

Simplification of Heavy Matrices by Liquid–Liquid Extraction: Part I—How to Separate LMW, MMW, and HMW Compounds in Maltene Fractions of V, Ni, and S Compounds

“…2,3 A study performed using XAFS spectroscopy showed that the coordination shells of all compounds of V and Ni present in petroleum are very similar to those of vanadyl and nickel porphyrins. 4,5 In terms of their distribution in the products of petroleum, these compounds are almost all concentrated in atmospheric or vacuum residue based on their boiling points, 6 and they are present in asphaltenes and resins [7][8][9] when petroleum or residue is separated in their SARA fractions. Recently, three distinct families coexisting in the crude fraction of petroleum have been identified based on their molecular weight.…”

Recently developed applications for natural hydrophilic polymers

“…Large quantities of nickel and sulfur in crude oil make the refining process heavier; unfortunately, the current conventional processes to remove these materials require a significant investment and long reaction times [188][189][190][191]. Wang et al Chitosan compounds have also been used as oxidants [193][194][195][196][197][198][199].…”

Recent Advances and Perspective on Design and Synthesis of Electrode Materials for Electrochemical Sensing of Heavy Metals

“…While fast response, high sensitivity, and wide sensing spectrum are the generally required parameters for sensing, ease of operation with low cost is also highly demanded. Conventional benchtop techniques such as inductively coupled plasma optical emission spectrometry (ICP‐OES), UV–Vis spectrometry, atomic absorption/emission spectroscopy, and laser‐induced breakdown spectroscopy (LIBS) are generally located in high‐level laboratories with professional personnel, which are not suitable for fast, inexpensive, and in situ measurements without tedious sample preparation. The growing demand for real‐time on‐site monitoring of water quality for human health and the environment requires a competitively sensitive and reliable method with low cost and less environmental pressure.…”